To provide a power feeding device capable of feeding a driving power source efficiently and inexpensively, as well as capable of enabling a variety of illumination control, in case of using a plurality of lighting fixtures using light-emitting elements such as organic EL elements.

The device includes a single direct-current feeding power source 1 carrying out output conversion into direct-current power with power supply from alternating-current power source, a plurality of lighting fixtures 8 whose light sources are solid light-emitting elements (organic EL elements) each driven to be lit with supply of the direct-current power source from the direct-current feeding power source, a single main controller 2 which generates a control signal for controlling dimming with regard to the plurality of lighting fixtures 8, and sub controllers 7, provided corresponding to each unit of (a) lighting fixture(s), with one or more lighting fixtures as the unit, and controlling dimming of the lighting fixture(s) by the each unit based on the control signal sent from the controller 2.